Multiple sequences in different test Sockets

Hi all,
I`m using Parallel process model in TestStand 2010,
My requirement is to run 10 different sequences which communicate with 10 different DUT/UUT at a time,
Is it possible to execute different sequences in individual test sockets, for eg., sequence abc01.seq in test socket 0 of 10, abc02.seq in test socket 1 of 10, …… abc10.seq in test socket 10 of 10. And all should run simultaneously.
Any suggestion is helpful,
Regards,
Prashanth

Try here as a start
It was just an idea I had a few years ago.
Regards
Ray Farmer

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Different material formats - multiple sequences

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new to fcp. i'm editing a project where i'm importing source materials in different formats (different image dimensions, framerate, etc.). if i edit all those clips in the same sequence and then render everything, i loose some of the original quality of the clips (probably the cost of rendering?). therefore i thought i should try creating an individual sequence with settings matching for each clip groups i have. is that the smart thing to do? can i avoid loosing quality when rendering clips from one format to another or is it a normal thing?
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Sharing a communication object between test sockets

Hi everyone, I am having some trouble using teststand in batch mode as it is my first time doing so. Here is my question:
I am creating a test sequence that uses multiple test sockets. I am using a switching matrix that is controlled over ethernet to allow me to connect different loads to the hardware under test. I only have one load, but I have several different devices that need to connect to that load for the tests to be run, and they can only be connected one at a time.
My approach was to initilaze the connection to the switching matrix and store the resulting object reference as a global variable, which allows me to send commands to the switch matrix from any sub-sequence. I then created another sub sequence for the load tests called "External Load Tests". In this step, the load is connected to the hardware via the switching matrix, and tests are run. I am using batch mode, so I put a lock on the "External Load Tests" sub sequence so that only one thread can enter at a time.
This sequence works if there is only one active test socket. If there is more that one, the first thread will get inside the external "External Load Tests" step and try to send a command to the switch matrix using the object reference that I mentioned. However, when this happens, the step hangs indefinitely until the other threads are manually stopped. It seams like the thread isnt being given access to the switch matrix object, becuase usually if there is an error the switch matrix driver throws an exception, but in this case it just hangs.
Any ideas on how I can fix this? I don't have a lot of experience with multi threading, so any advice would be greatly appreciated.
Thanks!

For the batch model you could use a serialized batch synchronization section rather than a lock. A lock should also work though, it just doesn't guarantee that all threads get to the section before any of them continue and doesn't guarantee the order like batch synchronization does. Typically you should use all default settings for the batch model (other than perhaps number of sockets). Which setting did you change? The 'Default Batch Synchronization' setting? You should typically leave this as "Don't Synchronize". Setting this to Parallel makes it synchronize at every step which requires all sockets to get to each step before any of them to continue. This is not the behavior that people typically want. In most cases you should use the default of "Don't Synchronize" and then set synchronization manually in your sequence where you want it, either using the step synchronization settings, or the batch synchronization step types, or other synchronization step types such as locks.
Hope this helps,
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Getting Test Socket status in batch mode

Hi!
I´m running multiple UUT´s in the standard batch model.
I need to find a way to get a teststep running in one test socket to know the current status (passed, failed, terminated etc.) for all other test sockets.
Is this possible?
One solution might be to have each test socket to store the context pointer (CAObjHandle seqContextCVI when using LabWindows) to an array at the beginning of each test socket and then access each others test socket context. This way it might be possible if there is a context value or string to look for. Is this a good idea at all or are there better solutions?
/ Roine

Hi,
this would in fact be better in the TestStand discussion group.
However, there are several options available to you.
The first is to use queues. They're in the synchronisation menu. That way you can make sure you don't write to the same variable from two different threads before a third one has read it.
The second option is to store the seqContext pointer, however, this pointer is only a reference to where you currently are, i.e. if you start flying around launching other threads, then your seqContext might not be correct at that time
The third option is the hardest to implement. In the batch process model, the execution handles that are involved in the launching of Test UUT -- Test Socket Entry Point, are stored in a FileGlobal to the processmodel : FileGlobals->TestSocketExecutions. However, when you're in your sequence file, and you look at Runstate.Root.FileGlobals.TestSocketExecutions, it's empty. This is because that array hasn't been set as shared. So the top level Test UUT's can see it, but since we're launching executions, we cannot see it. So in the processmodel, you have to find the fileglobals, find the TestSocketExecutions, go to it's properties, and then hit the advanced button. Go down that list, and look for the property flag for shared at run-time.
That way, Runstate.Root.FileGlobals.TestSocketExecutions will have an array of execution reference handles.
From this handle, there's a method of the execution object to get a thread. This is where it's difficult, since you might not know which thread you're trying to get hold of. Once you have one of those, you can get the seqeuence context for that thread, and then you can (get using that as a property object), the number, string etc, from the other thread.
The last option is simply to share (as in option 3, but in the client sequence file) a variable, however, you can easily run into the problem you see in option 1 since the resource is like using station globals. There's no marshalling system to make sure things are written to before they're read from.
Hope that helps
Sacha Emery
National Instruments (UK)
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How to change Number of test socket in Model option during run-time

I wanna be able to change the the number of test sockets(in the Model Options menu) during runtime. I have overriden the Prebatch callback and used my own instead. I have a LabView program in my Prebatch where I would select the test script each time before running the batch. I wann be able to also modify the number of test sockets each time before I run the batch again. I tried setting the "Parameters.ModelData.ModelOptions.NumTestSockets" from the Labview program which is in my Prebatch before running each batch, but get into errors. Please help?

Hello Kumar,
The Batch process model shipped with TestStand does not handle this scenario, but you can still do this. Attached is a sequence file that utilizes the Batch Model's ProcessCleanup callback to reset the next execution point. It still uses the method of setting the Parameters.ModelOptions.NumTestSockets variable in the PreBatch callback. The change I added was three steps to a different callback (the ProcessCleanup callback):
Message Popup - prompts Yes or No to continue testing with a new batch size.
Statement 1 - based on the response to the message popup (via precondition), resets the Batch Model's next step to be executed and the ContinueTesting flag:
RunState.Root.RunState.StepGroup = "Setup"
RunState.Root.RunState.NextStepIndex = 0
RunState.Root.Locals.ModelData.ContinueTesting = True
Statement 2 - based on the response to the message popup (via precondition), loops to reset each TestSocket's ContinueTesting flag:
RunState.Root.Locals.ModelData.TestSockets[RunState.LoopIndex].ContinueTesting = True
These two statement steps force the next step to be executed in the Batch Process Model to be the first step in the "Setup" step group, and reset all necessary flags for the batch itself and the individual TestSockets. I discovered the flags that had to be reset by trial-and-error (that was the time-consuming part).
You can run continuous batches of the same size you first chose (for as long as you like), but when stop the batch execution this new message popup will prompt (yes/no) whether you want to continue testing with a new batch size. If no, then processing terminates. If yes, then the next two statement steps are run and execution resumes back at the beginning of the Batch Process Model's Setup step group. This forces the ModelOptions callback to be executed again, so your VI (in my example here it's just a Message Popop) can then set NumTestSockets appropriately.
Thanks for contacting National Instruments!
David Mc.
NI Applications Engineering
Attachments:
kumar.seq ‏27 KB

Associating a comm port with a TS test socket

Hello,
In order to run several test platforms on one machine (parallel model), I must be able to associate each test socket with a unique serial port. Each hardware platform has it's own serial connection which is built in Labview. So my question is, "how can I use a single test sequence calling LV VIs where each test socket must use a different comm port?"
Thank you for helping,
Adam

How dynamic is the com port configurations? Will some testers only differ in the number of ports? If that's the case, then you'll also need to dynamically change how many sockets you're testing. This could be done, probably in a sequence file load callback and with the LabVIEW function VISA Find Resource. Searching for all ASRL resources will return a count and their names. You could populate a station global string array with the names. Right now, I have a fixed count of resources so I just populate a main sequence local variable with all of the possible names. I assign the resource name for the VI as Locals.VISAResource and in a pre-expression for the VI, Locals.VISAResource = Locals.AllVISAResources[RunState.TestSockets.MyIndex]

Test Socket PreStep Callback

Hi:
I'm trying to create a trace file that contains information on every single step executed by Teststand. I do not want to have to edit any test sequence files, only the model files. I have tried using sequence callbacks StationPreStep (StationCallbacks.seq), ProcessModelPreStep (BatchModel.seq) and SequenceFilePreStep (BatchModel.seq). All of these only show me some of the steps. I do not see step results for any of the test sockets. I only see steps that have been called by the controlling 'Test UUTs' socket.
Can anyone tell me how to implement a PreStep callback on the test socket steps without editing any test sequence files?
Thanks,
Dave

Nevermind.... the callbacks work. It was a different problem. I was enabling the tracing via a variable that was only enabled on Test UUTs. Working now!

How can I edit multiple clips with different frame rates on the same timeline

how can I edit multiple clips with different frame rates on the same timeline

You do not want to edit material from different frame rates on one timeline. You CAN do this, but it is a very bad idea - and this is why.
Once you establish the sequence frame rate - lets say it is PAL material at 25fps, any material that you drop into the sequence other than 25 fps will have to be changed to play at 25 fps. If the material you add is NTSC (29.97), FCP will DROP 5 frames per sec to bring the frame rate down to 25 fps. Which 5 get thrown away? Every 6th one. This yields a funky cadence that becomes even more complex as as there are also interlaced fields (DV/NTSC is an interlaced format). Oh, and by the way, the image sizes are different as well. DV/PAL has 576 lines of resolution and DV/NTSC has 480. FCP has to scale up the NTSC to fit the PAL frame.
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x

How can I use two sequences w/ different frame rates

I shot wedding (on Sony Z5) initially (1st tape) in DV widescreen (29.97/ 30 fps) but tapes 2, 3 & 4 were shot 1080p24 fps Big mistake; now obvious.
Edited all in FCP 6. On trying to cut & paste sequences together I get " cannot nest sequences with different editing timebases".
I have 23 min.intro/ ceremony sequence as stand alone QT mov now. How can I best convert that and/or merge it w/ the rest ( 62 min. 24 fps sequences), or perform other action to unite the diff frame rates into one, w/ best looking quality for the DVD/ bride & groom? Trying to beat Xmas deadline...
Thanks in advance! Happy Holidays to all.
3 Ghz Intel Core 2 Duo / 8 GB / OS 10.6.8 FCP 6.0.6

I went back and forth on this.
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This will not be a short encode, so I would first test a short section to double check your settings and sound sync are right, and to compare against the quality of tape 1.
Good luck.
Russ

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I am using TestStand 3.0 to a test application. Because we want to have our limits in a csv-file I have tried to use the Import/Export tools in TS. But this application only supports to export limits for the selected sequence (e.g. main, or subseq1) at a time. This makes it a pretty hard job to export limits from 30 test sequences. What I need is a possibility to export my limits from �all sequences� in my seq-file.
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http://sine.ni.com/apps/we/niepd_web_display.DISPLAY_EPD4?p_guid=B45EACE3D9CB56A4E034080020E74861&p_node=DZ52236&p_submitted=N&p_rank=&p_answer=&p_sourc
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Thanks for your reply. I have already considered this solution because the source code is added in the folder described in your reply. But that is not a good solution. It will cost me a lot of time to establish the toolchain, reverse engineer the source code, make the implementations and build a new dll (most off these is already knowledge by NI). And when NI make future releases of TestStand I have some merge work to do every time NI have made some changes in the files I have changed.
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Thank's a lot.
Maria

One way you can set the number of Test Sockets for your sequence is by overiding the ModelOptions Callback used by your sequence. Select All Sequences from the View drop-down then right click, select Sequence File Callbacks, select the ModelOptions callback and then click on Add. You can then select the Edit button to Edit the ModelOptions for your sequence. You can set other ModelOptions as required also.
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we have a planing sequence which is designed to handle one value of the characteristic "plan" in the filter.
In one special case we have to execute the sequence for all values of the characterisitc "plan".
In this special case we start the sequence via process chain.
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each of both alternatives has several problems
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Any help or opinion is appreciated?
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Hi Johannes,
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http://help.sap.com/saphelp_nw70/helpdata/EN/45/946677f8fb0cf2e10000000a114a6b/frameset.htm
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Could you please check this?
Regards Matthias

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I have now plugged it in the master socket and it has improved.
I then tried it in the test socket and it's even better.
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r1chmo wrote:
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http://www.kitz.co.uk/adsl/socket.htm
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BT Broadband customers - help with broadband, WiFi, networking, e-mail and phones.

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Edited by: Amrita Singh on May 21, 2009 7:54 AM

Multiple sequences in different test Sockets

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